JPS5933486B2 - shearing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shearing machine, and more particularly to a shearing machine that cuts a continuously running workpiece to a fixed size while running.

Generally, in pipe manufacturing equipment, such as electrical resistance welded pipe manufacturing equipment that produces relatively thin-walled and small-diameter electrical resistance welded pipes, a shearing machine is used at the final stage to cut the continuously produced electrical resistance welded pipes to size while running. It is normal that it is provided.

As a shearing machine for cutting a material to be cut to a fixed size while it is continuously running, a Scotchoke type shearing machine as shown in FIG. 1 is conventionally known.

In this shearing machine, two guide rods 5 and 6 extending parallel to the running direction of the material to be cut 40 are supported vertically apart from each other on a support frame 2.3 installed upright on a base frame 1. A running body 7 slidably fitted to the rods 5 and 6
. A cutter holder 13 equipped with an upper movable blade 12 that cooperates with a lower movable blade 11 to shear the material 4 to be cut is fitted so as to be vertically movable. One end of the arm 14 is pivotally connected, and the other end of the swing arm 14 is fixed to a rotating shaft 17 of a speed-adjustable motor 16 that is fixedly supported via a motor support frame 15 erected on the base frame 1. ing.

Therefore, by rotating the rotating arm 14 in an appropriate direction via the motor 16, the upper moving blade 12 is moved to the lower moving blade 11.
The workpiece 4 is moved up and down in order to shear the workpiece 4, and the upper and lower movable blades 12 and 11 are both reciprocated in the same direction as the travel direction of the workpiece 40, keeping the workpiece 4 fixed in the traveling state. Can be cut to size.

However, when shearing the material 4 to be cut with this shearing machine, from the start of shearing to the end of shearing, the traveling speed of the upper and lower movable blades 12, 11 in the same direction as the traveling direction of the material 4 to be cut is In order to synchronize the traveling speed of the material to be cut 40, for example, if the rotation angle required for shearing the swing arm 14 is set to 90 degrees, it is necessary to adjust the rotation speed of the motor 16 by more than 40% in a short time. , the capacity of the motor 16 has to be considerably increased, and the depth of cut,
In other words, the movement range of the upper moving blade 12 is restricted, and furthermore, the cutting length of the workpiece 4 is restricted due to the expansion of the speed adjustment range as the depth of cut increases, and the motor 1
There are problems such as the need to increase the capacity of 6.

In order to deal with this problem, separate drive devices are used to reciprocate the cutter unit, which consists of a fixed blade and a movable blade, in the feeding direction of the material to be cut, and to move the movable blade toward and away from the fixed blade. It is known that the movable blade approaches and leaves the blade using a double-acting cylinder that moves back and forth with the cutter, and that a solenoid valve switches the working fluid flowing into and out of the double-acting cylinder. It is being

However, when switching the working fluid using a solenoid valve, there is a delay of about 20 ms in operation, and for example, when the traveling speed of the material to be cut is about 120 m/mjn, there is a delay of 1.
There is a problem in that it is impossible to cut to a length of 5 m or less.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a speed-adjustable cutter section that is made up of a pair of fixed blades and a movable blade so as to move forward in the traveling direction of the material to be cut. a reciprocating drive mechanism connected in conjunction with a rotary drive device; a reciprocating cylinder attached to a cutter portion for moving the movable blade toward and away from the fixed blade in a direction orthogonal to the feeding direction of the material to be cut;
By providing a rotary valve, which is a two-way valve having a rotor (rotary spool) interlocked with the rotating shaft of the rotary drive device, to switch the working fluid supplied to and discharged from the double-acting cylinder, it is possible to To provide a shearing machine capable of cutting short lengths while accurately synchronizing the cut material with the reciprocating motion of a cutter part, and also capable of reducing the capacity of a rotary drive device.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings after FIG.

The shearing machine 18 according to the present invention sizing a material 19 to be cut that is continuously moved, for example, an ERW pipe that is continuously produced in an ERW pipe manufacturing facility that manufactures ERW pipes that are relatively thin and have a small diameter. This is for cutting, and as shown in FIGS. 2, 3, and 4, it includes a frame 20, a running direction of the material to be cut 19 (to the right in FIGS. 2 and 3), In other words, the cutter part 2 is slidably provided in the same direction as the material feeding direction.
1, a speed-adjustable rotary drive device 22 fixed to the frame 20, and a reciprocating drive mechanism that converts the rotational force of the rotary drive device 220 into linear reciprocating motion in the same direction as the material feeding direction to reciprocate the cutter section 21. 23, and a double-acting cylinder 24 attached to the cutter section 21 to apply shearing force to the cutter section 21.
The rotary valve 25 is a two-way switching valve connected in conjunction with the rotary drive device 22 to switch the working fluid supplied to and discharged from the double-acting cylinder 24.

That is, a pair of rond support frames 27 and 28 are erected on the bed 26 at an appropriate distance from each other in the feeding direction of the material to be cut 19, and these rond support frames 27 and 28
In this case, a plurality of guide rods 29 extending in the same direction as the material sandwiching direction are appropriately spaced apart in the vertical direction (vertical direction in FIG. 2) and in the horizontal direction orthogonal to the material feeding direction (vertical direction in FIG. 3). are supported parallel to each other.

A cylindrical running case 30 extending in the vertical direction perpendicular to the material feeding direction is located on the guide rod 29 approximately in the middle of the guide rods 29 that are spaced apart in the left-right direction, and projects on both left and right sides of the upper end. The installed guide block 31.
31 and a guide block 32 protruding from the left side of the lower end, the guide block 32 is slidably supported in the material feeding direction.

A fixed blade holder 34 having a hole 33 through which the material to be cut 19 can be freely inserted is fixed to the upper end of the traveling case 30 and protrudes from the upper ends of the rond support frames 27 and 28.

The fixed blade holder 34 constitutes a part of the cutter section 21,
On the right side in FIG. 2, there is a hole 35 having the same shape as the hole 33.
A fixed blade 36 having a diameter is provided.

The body of the fixed blade 36 is provided with a movable blade insertion hole 37 that communicates with the hole 35 and penetrates in the extending direction of the traveling case 30. The cutting edge side of a movable blade 38 that shears the material 19 to be cut is slidably inserted.

The base of the movable blade 38 is connected to a fastener 39 such as a bolt.
The movable blade holder 40 is fitted into a hole bored in the shaft center of one end of a movable shaft 41 which is slidably fitted into the traveling case 30, 42.

The movable shaft 41 is reciprocated by the reciprocating cylinder 24 attached to the other end of the traveling case 30, as will be described later, and its rotation with respect to the traveling case is restricted by a rotation prevention means (not shown). It is something that exists.

A bracket 43 is provided near the middle of the travel case 30 and protrudes leftward in FIGS. 2 and 3, and the reciprocating drive mechanism 2
One end of an output link 44 of a rotary slider crank mechanism, which is a type of quick return mechanism constituting part 3, is pivotally connected via a pin 45.

The output link 44 is swingably inserted through a hole 46 provided in the one (left side in FIG. 2) rod support frame 27, and the other end is connected to the tip of the slide link 47 via a pin 48. connected.

The base of the slide link 470 is inserted into the bed 26 through its hole 26.
It is pivotally supported via a fixed shaft 50 by a bearing bracket 49 that is vertically installed and protrudes from a, so that it can swing freely in a vertical plane.

A fly ink slide 51 is fitted into the slide link 47 so as to be slidable in the longitudinal direction, and a crank lever 54 fixed to one end of a shaft 53 rotatably supported by a bearing case 52 is attached to the fly ink slide 51. The tip of is pivotally attached via a pivot 55.

The shaft 53 extends in the horizontal direction perpendicular to the material feeding direction, and the bearing case 52 connects the rod support frames 27 and 2B to the bed 26.
It is supported by a bearing support frame 56 erected upright, and the bearing support frame 56 is reinforced by an auxiliary frame 57 provided parallel to the rod support frame 27 .

The other end of the shaft 53 is connected via a coupling 59 to one end of a rotary shaft 58 of the rotary drive device 22, such as a speed-adjustable DC motor mounted and fixed on the bed 26.

At the other end of the traveling case 30, the double-acting cylinder 24 is provided.
are fixed coaxially, and the end of the piston rod 60 is integrally connected to the other end of the movable shaft 41.

The base of the piston rondro 0 is provided integrally with a piston 62 that is slidably inserted into the cylinder body 61.
This piston 62 allows the interior of the cylinder body 61 to be divided into an upper first chamber 61a and a lower second chamber in FIGS. 2 and 4.
It is divided into a chamber 61b.

Ports 63 and 64 provided in the cylinder body 61 and communicating with each chamber 61a and 61b are connected to a high-pressure working fluid source that supplies high-pressure working fluid such as compressed air or pressurized oil through the rotary valve 25, as described later. (not shown) and each chamber 61a of the cylinder body 61.

61b and the first and second connecting vibros 5
, 66 are connected at one end.

In addition, in FIG. 2, 30a is a communication hole that communicates the other end side in the running case 30 with the atmosphere, and this communication hole 30a
An air muffler (not shown) is attached to the outside of the unit.

The other ends of the first and second connecting vibros 5 and 66 are connected to a rotary valve 25 that is operatively connected to the rotary drive device 22.

That is, as shown in FIG. 4, a main body 67 of the rotary valve 25 is placed and fixed on the bed 26, and a rotor chamber 68 provided in the main body 61 houses a roughly cylindrical rotor (rotary spool). ) 69 is rotatably housed in sliding contact with the inner surface of the rotor chamber 68.

Shaft portions 69a and 69b, which are rotatably fitted into the main body 67, are integrally provided at both ends of the rotor 69, and one shaft portion 69a protrudes through the main body 67. A driven gear 71 that meshes with a drive gear 70 attached to the other end of the rotating shaft 58 of the rotary drive device 220 is attached to the end thereof.

The gears 70 and 71 have the same diameter so that the rotating shaft 58 and the rotor 69 rotate in synchronization with each other in a one-to-one correspondence. They may be rotated synchronously using a transmission means such as a timing belt.

On both ends of the rotor chamber 68 in the main body 67,
As shown in FIGS. 4, 5 and 6, circumferential first and second pressure pockets 72, 73 and first and second drain pockets γ4. The pressure pockets 72 and 73 and the drain tanks 74 and 75 are respectively provided in the first and second pressure pockets 76 provided in the main body 6γ. .77 and first and second inlet ports 78 and 79.

The first and second pressure ports) 76 and 77 are connected to the high pressure working fluid source through pipes (not shown), and the first and second drain ports (78, 79) are connected to drains via pipes (not shown). It is connected to a tank (not shown).

In addition, the first pressure capo door 6 and the first drain port 78
The second pressure port 77 and the second drain port 79 are provided symmetrically with each other, as shown in FIGS. 5 and 6.

As shown in FIGS. 4, 7, and 8, first and second circumferential grooves 80 and 81 are provided near the intermediate portion of the rotor 69 and are spaced apart from each other in the longitudinal direction. Circumferential grooves 80, 81
By providing these, first and second output pockets 82 and 83 are formed between the rotor 69 and the circumferential surface of the rotor chamber 68, respectively.

Each output pocket) 82, 83 is communicated with first and second output ports 84, 85 provided in the main body 67,
The other ends of the first and second connection vibrators 5 and 66 are connected to each output capo 84 and 85, respectively.

In addition, each of the output pockets 82 and 83 has one end of first and second communication holes 86 and 870 bored in the body of the rotor 69, and the other end of each of the communication holes 86 and 87 has an opening. The first pressure pocket 72 is opened at a position facing the first drain pocket 74 and the second pressure pocket 73, the second drain pocket 75.

Note that when the first output pocket 82 is in communication with the first pressure pocket 72 or the first drain pocket 74 via the first communication hole 86, the second output pocket 83 is in the opposite position to the first output pocket 82. The drain pocket 75 or the second pressure pocket 73 is provided to communicate with the second drain pocket 75 or the second pressure pocket 73 through the second communication hole 87.

In order to shear the continuously running workpiece 19 with the shearing machine 18 having the above configuration, the workpiece 19 is inserted into the hole 33 of the fixed blade holder 34, and the rotary drive device 22 is rotated. The reciprocating drive mechanism 23 is operated by driving while controlling the speed.

As the output link 44 of the reciprocating drive mechanism 23 moves forward, the traveling case 30 and the reciprocating cylinder 24 move toward the guide rod 2.
When the moving speed of both is synchronized with the traveling speed of the material to be cut 190, the rotor 69 of the rotary valve 25 connected to the rotary drive device 22
Due to the rotation of the rotary valve 25, the working fluid from the high-pressure working fluid source flows through the second pressure cupboard 7, the second pressure pocket 73, the second communication hole 87, the second output pocket 83, and the second output port 85 of the rotary valve 25. through the second connecting pipe 66, flows into the second chamber 61b of the cylinder body 61 through the port 64, and also flows into the first chamber 61a of the cylinder body 61.
The working fluid within reaches the rotary valve 25 via the port 63 and the first connecting vibro 5, and also the first output port 84, the first output pocket, and the first output port of the rotary valve 25.
The movable blade 3 is discharged into the drain tank through the communication hole 86, the first drain port 74, and the first drain port 78, and as the movable shaft 41 moves upward in FIGS. 2 and 4, the movable blade 3
8 approaches the fixed blade 36, and the material to be cut 19 is sheared by their cooperation.

Then, while the cutter section 21 and the like are being moved in synchronization with the traveling speed of the material to be cut 19, as the rotor 69 of the rotary valve 25 is rotated by the drive of the rotary drive device 22, the rotor 69 of the rotary valve 25 is rotated. Conversely, the first chamber 61 of the double-acting cylinder 24
The working fluid flows into the interior of the second chamber 61b, and the working fluid is discharged from the second chamber 61b, thereby separating the movable blade 38 from the fixed blade 36.

When the cutter section 21 and the reciprocating cylinder 24 reach the stroke end during forward movement, the movable blade 38 of the cutter section 21 moves away from the fixed blade 36 due to the quick return function of the rotary slider crank mechanism that constitutes the reciprocating drive mechanism 23. One stroke operation is completed by quickly performing a backward movement while maintaining the separated state.

In addition, each chamber 61a of the double-movement cylinder 24 during the double-movement,
The working fluid in 61b is communicated between the first pressure pocket 72 and the first drain pocket 74 in the rotary valve 25, and the second pressure pocket 73 and the second drain pocket 75.
It is in a so-called neutral position, where communication with the air is cut off, so that no inflow or outflow occurs.

Then, by repeating the above-described operations one after another, the material to be cut 19 is cut to a fixed size.

As described above, in the present invention, a plurality of guide rods extending in the same direction as the traveling direction of the material to be cut are mounted on a frame in parallel with each other, and a tube extending in the direction perpendicular to the traveling direction of the material to be cut is attached to the guide rod. A shaped traveling case is connected to a reciprocating drive mechanism interlocked with a speed-adjustable rotary drive device, and a fixed blade that can freely insert the material to be cut is attached to one end of the traveling case. A movable blade for shearing the material to be cut is attached to one end of a movable shaft that is slidably inserted into a traveling case, and the other end of the movable shaft is attached to the other end of the traveling case. The rotor has a rotor that is connected to the rotary shaft of the rotary drive device, and the double-acting cylinder and a working fluid source that supplies a working fluid to the double-acting cylinder to move the movable blade toward and away from the fixed blade. Since this is a shearing machine connected via a rotary valve, the cutter can be operated in precise synchronization with the traveling speed of the material to be cut, allowing extremely short lengths of the material to be cut to be cut at high speed. Not only can cutting be performed, but also the rotary drive device can have a small capacity.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional shearing machine with some parts omitted;
The figure is a partially cutaway front view of the shearing machine according to the present invention, and FIG. 3 is a partially cutaway plan view of the shearing machine according to the present invention.
Figure 4 is a sectional view taken along the line ■-■ in Figure 2, Figures 5 and 6.
Figures 1 and 8 are V- in Figure 4, respectively.
They are sectional views taken along the lines ■, ■-■, ■-■, and ■-■. 19... Material to be cut, 20... Frame, 21... Cutter section, 22... Rotation drive device, 23... Reciprocating drive Mechanism, 24...
...double acting cylinder, 25... rotary valve,
29... Guide rod, 30... Traveling case, 36... Fixed blade, 38... Movable blade, 41... Movable axis, 58... Rotating shaft, 60... Piston rod, 69''°°°゛7-ta.

Claims (1)

[Claims] 1 A plurality of guide rods extending in the same direction as the running direction of the material to be cut are mounted on the frame in parallel with each other, and a cylindrical running case extending in the direction perpendicular to the running direction of the material to be cut is attached to the guide rods at a speed. A fixed blade is connected to a reciprocating drive mechanism that is interlocked with an adjustable rotary drive device, and a fixed blade that can freely insert the material to be cut is installed at one end of the traveling case. A movable blade is attached to one end of a movable shaft that is slidably inserted into a running case, and the other end of the movable shaft is connected to a piston rod of a double-acting cylinder fitted to the other end of the running case. A cylinder and a working fluid source that supplies working fluid to the reciprocating cylinder to move the movable blade toward and away from the fixed blade are connected via a rotary valve having a rotor interlockingly connected to the rotating shaft of the rotary drive device. A shearing machine characterized by: